Symptoms:

  • 1-2 Bang at light throttle
  • Reduced 2-4 band life

Cause:

Available accumulator valve train kit ratios in GM 200-R4 and 4L60 units do not support the 4L60-E family of transmissions, impacting shift feel and resulting in poor shift quality.

Correction:

Sonnax drop-in accumulator valve train kit, designed for later model applications, will eliminate oil loss and maintain holding power to ensure proper shift feel.

4L60-E, 4L65-E, 4L70-E

Accumulator Valve Train Kit
Part No. 77754-10K

Fits valve trains with sleeve stamp codes CX, DX or YZ only.

You need this if... View Instructions Find a Distributor

Vehicles with GM 4L60-E, 4L65-E or 4L70-E transmissions can experience light throttle shifts and poor shift quality as well as early 2-4 band failure. These problems can occur due to sleeve wear allowing torque signal and/or accumulator pressure leakage, sticking valves or using the incorrect accumulator valve ratio for the application.

The 4L60-E series valve train has three OE size variations; CX, DX, and YZ. The size variations are clearly stamped with the letters on the aluminum sleeve. The most commonly found size is the DX. However, these versions are not available unless scavenged from other valve bodies. Sonnax accumulator valve train kit 77754-10K is specifically designed for the DX size with additional selective springs to cover the CX and YZ sizes.

  • Sleeve is manufactured from high-quality aluminum designed to prevent excessive wear due to the reciprocating motion of the steel valve
  • Contains three selective springs
  • Drop-in Zip Valve™ parts install quickly and easily
Learn More About Zip Valve™ Drop-In Repairs
  • Valve
  • Sleeve
  • Springs (3) Selective
  • Plug

Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.

GM 4L60-E, 4L65-E, 4L70-E Valve Body Layout

GM 4L60-E, 4L65-E, 4L70-E Valve Body Layout
  • 4L60-E, 4L65-E, 4L70-E Accumulator Valve Train Kit 77754-10K
  • 4L60-E, 4L65-E, 4L70-E Accumulator Valve Train Kit 77754-10K
  • 4L60-E, 4L65-E, 4L70-E Accumulator Valve Train Kit 77754-10K details
  • 4L60-E, 4L65-E, 4L70-E Accumulator Valve Train Kit 77754-10K details
  • 4L60-E, 4L65-E, 4L70-E Accumulator Valve Train Kit 77754-10K details

You need this if...

Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.

4L60-E, 4L65-E, 4L70-E Accumulator Valve Train Kit Vacuum Test Locations